34 On the Uses of the Dorsal Vessel. (Jory, 
J adduced six years ago; and yet Dr. Cross tells me I have not said 
one word of the cerebellum receiving nervous energy from the face, 
but that he has now made the discovery! Though, however, the 
muscles of the face thus receive motive energy from the cerebellum, 
not one of its sensitive nerves are derived from it; for even the 
auditory nerve, after crossing the corpora restiformia, ascends to the 
cerebrum. As, then, the face receives only motive and not sensitive 
energy from the cerebellum, and as I proved this six years ago, I 
cannot divine io what discovery it is that Dr. Cross on this iicet 
pretends.—Having thus done justice to myself by exposing this (I 
dare say unintentional) plagiarism, I leave it to some friend of Dr. 
Crawford’s to do him similar justice with regard to Dr. Cross’s 
charcoal hypothesis of respiration. 
(To be continued.) 
Se 
ArricLte VIL 
Olservations on the Uses of the Dorsal Vessel, or on the Influence 
which the Heart exercises in. the Organization of articulated 
Animals, and on the Changes which that Organization, expe- 
riences when the Heart or the Organ of Circulation ceases. to 
exist. By M. Marcel de Serres, 
(Concluded from Vol. V. p. 379.) 
I. Respiration in the Air by means of Tubular Trachee. 
Division \.—Only Arterial Trachee. 
Putmonary trachee exist in the greater number of the caleop- 
teres; but there are certain genera, as the cerambyx, blaps, and 
most of tenebrunides, in which they are not observed. These 
tracheze take air immediately, forming round the stigmata very 
yumerous bundles. But that a communication may be established 
among all the trachez, there exists a common trunk which extends 
from one stigma to another, and which opens in that part. It is 
from this common trunk that these numerous bundles proceed, of 
which we have spoken, and which distribute the air to all parts of 
the body, The direction of the trachew, then, is almost always 
transversal. As these vessels issue in bundles from a common trunk, 
they present in some measure the disposition of a horse’s tail. In 
the genera of which we are speaking, the trachez are very nume- 
rous in the breast; to such a degree, indeed, that they almost 
cover the muscles of that part. We see them all presenting a 
transversal direction. As they are very near each other, they form 
oo the muscles parallel streaks, so very close together that it is with 
difficulty that any interval at all can be seen between them. These 
